code: def test_save_dir(neptune_mock):
      logger = NeptuneLogger(api_key="test", project="project")
      assert logger.save_dir == os.path.join(os.getcwd(), ".neptune")
  
imports: import os
  import pickle
  from collections import namedtuple
  from unittest import mock
  from unittest.mock import MagicMock, call
  import lightning.pytorch
  import pytest
  import torch
  from lightning.pytorch import Trainer
  from lightning.pytorch.demos.boring_classes import BoringModel
  from lightning.pytorch.loggers import NeptuneLogger
label_desc: Use image node_id 16 for calling a global function with example usage: test_save_dir(neptune_mock) without return types